Processing At Power On And Power Off; Power On Operation; Operation Until Operation Ready Status; Cpu Unit Startup Time At Power On - Omron NJ501-1 Series User Manual

4 Installation and Wiring
4-1 Processing at Power ON and Power
OFF
• Do not touch the terminal section while power is ON. Electrical shock may occur.
• Do not disassemble any of the Units. Particularly the Power Supply Units contain
parts with high voltages when power is ON or immediately after power is turned
OFF. Electrical shock may occur. There are also sharp internal parts that may
cause injury.
4-1-1

Power ON Operation

Precautions for Safe Use
It takes approximately 10 to 20 s to enter RUN mode after the power supply is turned ON. The
outputs during this period will behave according to the slave and Unit specifications. Use the
RUN output on the Power Supply Unit, for example, to implement fail-safe circuits so that exter-
nal devices do not operate incorrectly.

Operation until Operation Ready Status

The CPU Unit will enter operation-ready status after the following time elapses once power supply to
the Power Supply Unit starts.
The RUN indicator will flash at a 1-s interval until operation-ready status is entered. (During that time,
the Controller will be in startup status.)

CPU Unit Startup Time at Power ON

It takes approximately 10 to 20 seconds for the CPU Unit to start up. The startup time depends on
the slave/Unit configuration,
nosis usage,
*1 Some EtherCAT slaves can set a maximum standby time of 30 to 200 s. For the CPU Unit, however, operation-
ready status exists as soon as the EtherCAT Master Function Module is functioning, regardless of the standby
time of the EtherCAT Slaves. For the EtherCAT Master Function Module, slaves that do not start within the
maximum waiting time are treated as having an error.
*2 This function performs self-diagnosis on the inserted SD Memory Card.
This is executed if the SD Memory Card self-diagnosis setting is set to enable execution of self-diagnosis in the
Operation Settings in the Controller Configurations and Setup in the Sysmac Studio.
4-2
WARNING
*1
user program, SD Memory Card usage, SD Memory Card self-diag-
*2
etc.
NJ-series CPU Unit Hardware User's Manual (W500)